No sure what the problem is, but each time I try to vacuum, I will get a good seal at the skimmer, but then, it seems there's little suction, and shortly after I've attached the hose to the skimmer, I will hear a louder noise coming from the pump, then bursts of water/air will shoot out from the jet. I have backwashed, rinsed, made sure hose is clear. We just replaced the filter head and replumbed this season. I don't notice any louder sounds when the pool is just on filter. Any ideas why I'm not getting good suction, and where I might be drawing in air if thats the problem? Thanks!